A spectacular Petrine Baroque summer palace commissioned for Catherine I by Peter the Great.

This free museum is building a collection of books that are banned, censored or burnt around the world.

Walk along the medieval fortifications that have been protecting Tallinn since the 14th century.

An unusual stone chair can be found on the banks of the River Wear, not far from Durham Cathedral.

Also known as “Robin Hood’s tree,” it became a famed location along Hadrian's Wall before it was cut down.

Dublin's most modern, visually spectacular bridge is modeled after Ireland's national emblem.

The oldest public library in Ireland.

This permanent collection of preserved bodies taken from Irish bogs is one of the leading authorities on such morbid mummies.

A slightly creepy gallery of plaster cast models in the same museum as Michelangelo's David.

This private skyway is filled with art and was expanded explicitly so that Hitler could appreciate a river.

These gigantic skeletons tower over visitors and provide insight into the creatures that once ruled over Ireland.

The modern birthplace of Irish freedom.

A devastating booze inferno poured through the streets, claiming several victims who drank it.

The site of the first battle of World War II.

A floundering Polish shipyard was once the soul of the Solidarity movement that capsized communism.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the first ‘Harry Potter’ film.

The site of London’s first coffee house has been serving refreshments of one kind or another for 360 years.

The last four extravagant street signs of London's historic banking street.

Red, white, and blue painted steps along with a Union Jack celebrate the outcome of Gibraltar's 1967 referendum.

A strange rock with a sinister reputation lurks within the crimson waters of this Scottish glen.

An eccentric aristocrat brought these Australian natives to their current Scottish home.

Largest lake in Great Britain measured by surface area.

This castle was established by the 4th Duke of Montrose and is connected to the Buchanan Clan.

This beautiful park on the outskirts of Rome protects the ruins of two colossal ancient aqueducts.